1-(Arylthio)methanesulfonamides

ABSTRACT

This invention concerns 1-arylthiomethanesulfonamides of the formula   WHEREIN R represents H, lower alkyl, lower alkoxy, halo or trifluoromethyl, n represents an integer from zero to 3 and R1 and R2 independently represent H, lower alkyl or phenyl; or R1 and R2 together with the nitrogen atom form a heterocyclic group or a lower alkyl- or phenyl-substituted heterocyclic group which may contain another nitrogen or an oxygen hetero atom. The compounds are prepared by reacting a halomethanesulfonamide with an alkali metal salt of a thiophenol. The compounds have antimicrobial activity.

United States Patent 1 1 Goralski et al.

1451 July 15, 1975 l l l-(ARYLTHIO)METHANESULFONAMIDES [75] Inventors: Christian T. Goralski; Thomas C.

Klingler. both of Midland. Mich.

[731 Assignee: The Dow Chemical Company.

Midland. Mich.

[221 Filed: Dec. 13. I972 [21] Appl. No: 314.793

[52] [1.8. CL. 260/247.l R; 260/268 S; 260/29373. I 260/3265 S. 260/326.84'. 260/556 A; 424/248; 424/250. 424/267; 424/274; 424/321 1511 Int. Cl ..C07d 87/46: C07d 29/36;

[581 Field of Search 260/556 A. 247.1. 326.84.

[56] References Cited UNITED STATES PATENTS 3.086.974 4/l963 Schliir et al 260/247.l 3.412.149 11/1968 Schliir et ul 260/556 A 3.641.033 2/1972 Levine 260/2948 F FOREIGN PATENTS OR APPLICATIONS 675.723 4/1939 Germany 260/556 A OTHER PUBLICATIONS Morrison et 211.. Organic Chemistry. (1970). pp. 756-757.

Primary E.t'untiner-Anton H. Sutto Assistant Eruminvr-Michael Shippen Attorney. Agent. or Finn-Theodore Post. C. Kenneth Bjork [57] ABSTRACT This invention concerns l-arylthiomethanesull'ontt mides of the formula 1 12 Claims. N0 Drawings l ARYLTHIO )METHANESULFONAMIDES SUMMARY OF THE INVENTION This invention concerns 1-(arylthio)methanesulfonamides corresponding to the formula wherein R represents H, lower alkyl, lower alkoxy, halo or trifluoromethyl, n represents an integer from zero to 3 and R, and R independently represent H, lower alkyl or phenyl; or R and R together with the nitrogen atom form a heterocyclic groupor a lower alkylor phenylsubstituted heterocyclic group which contains up to one other hetero atom of the group consisting of oxygen and nitrogen, such as, for example, a pyrrolidinyl, piperidinyl, piperazinyl, morpholinyl, 4-lower alkylpiperazinyl or a 4-phenylpiperidinyl group. In the specification and claims, lower alkyl and lower alkoxy" designate a 1" to 6 carbon straight or branched chain alkyl or alkoxy group, such as, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, tertiary butyl, n-pentyl or n-hexyl; or the correspondihg alkoxy'group, respectivelyLThe term halo designates fluoro, chloro or bromo. The compounds have antimicrobial activity.

The compounds-are prepared by, reacting a corresponding a-halornethanesulfonamide with an alkali metal salt of a corresponding thiophenol. The reaction is advantageously carried out in the presence of an appropriate polar organic solvent, such as, for example, methanol, ethanol or dimethylformamide as reaction medium. The reaction is carried out at a temperature at which alkali metal halide of reaction is formed, advantageously at a temperature ranging between about 25 and about 80C.

In carrying out the reaction, an excess of the alkali metal salt of the thiophenol is used, advantageously in about 2 molar proportions per molar proportion of the halomethanesulfonamide. In the reaction, the sodium or potassium salt of the thiophenol is advantageously used. Of the halomethanesulfonamides, the chloro, bromo or iodo species are advantageously used. The progress of the reaction may be followed by monitoring the byproduct alkali metal halide.

The reaction product is separated and recovered from the reaction medium by removing the solvent, advantageously in vacuo, washing the residue with water and recrystallizing the product from an appropriate organic solvent, advantageously a benzene/hexane mix ture, methanol, or ethanol, as appropriate. The product is identified by elemental analysis and by nuclear magnetic resonance spectroscopy (nmr).

In practice, the alkali metal salt of the thiophenol, advantageously formed in situ from the corresponding benzenethiol and alkali metal in methanol or ethanol is prepared and to it is added the halomethanesulfonamide, and the solution is refluxed to completion or substantial completion of the reaction. Solvent is then removed in vacuo and the product washed by stirring with water, the product then being filtered off and recrystallized from a suitable organic solvent such as, for example, a benzene/hexane mixture, methanol or ethanol. a

DESCRIPTION OF SOME PREFERRED EMBODIMENTS The following examples describe representative specific embodiments and the best mode contemplated by the inventors of carrying out the invention. Temperature is given in centrigrade degrees. The compounds are identified by elemental analysis and/or nuclear magnetic resonance spectroscopy.

EXAMPLE] N,N-Dimethyll phenylthio )methan esulfonamide' EXAMPla-E 2+ l-Methyl-4-( (phenylthio)methyl )sulfonyl)piperazine To a solution of 5.3 g. (0.228 mol) of sodium in 500 ml. of methanol is added 25 g. (0.228 mol) of benzenethiol. The system is flushed with dry nitrogen and 30 g. (0.1 17 mol) of 1-((bromomethyl)sulfonyl)-4- (methyl)piperazine added. After refluxing for 13 hours, the solvent is removed in vacuo and the product stirred with 500 ml. of aqueous 10% HCI. The mixture is filtered and the solution neutralized with sodium hydroxide. The product is filtered off and the solution extracted with methylene chloride. The organic phase is dried over Na SO filtered and the solvent removed to give additional product. Recrystallization from benzene/hexane gives 14.7 g. (44% yield) of white platelets, m.p. l23-l24C.

Anal. Calcd. for C H N O S C, 50.32; H, 6.34; N, 9.78; S, 22.39: Found: C, 50.24; H, 6.50; N, 9.78; S, 22.14.

EXAMPLE 3 TABLE I 1-(Arylthio)methanesulfonamides R gscr so n l R 2 Analyses Calcd. Found R,, 1911,12 m.p.,C. c H N s c H N s a) 4 cH NH 122-124 44.22 5.10 6.44 29.51 44.25 5.02 6.44 29.33 b) 4-Br NH 140-1405 29.79 2.86 4.96 22.73 29.55 3.00 5.13 23.05 C) 4 cH.,0 N cH., 65.5-67 45.95 5.78 5.35 24.54 45.86 5.86 5.57 24.90

I d) H 118-120 48.33 5.53 5.12 23.46 48.26 5.51 5.29 23.52

N/\ C) 4 c1" 143-1445 42.92 4.58 4.55 20.83 43.39 4.55 4.66 21.50

t 4-(CH 1) O 68-70 58.68 7.69 4.27 19.58 58.68 7.50 4.32 19.52 g) H ran-Q 75-77 55.89 4.69 5.01 22.96 54.98 4.49 5.01 22.86

h) H "(D-Q 1095-1105 62.21 6.09 4.03 18.45 62.26 6.l7 4.19 18.36

1 3.4-c1.,' N cH .,)c,H 87-89 46.41 3.62 3.86 17.70 45.99 3.55 4.01 18.07 j) 3.4-0, NH 102-104 30.89 2.59 5.14 23.56 30.75 2.70 5.00 23.76 k) 3 cr NH 76-77 35.42 2.97 5.16 23.64 35.36 3.13 5.05 1 2 5-0, NH, 159-161 27.42 1.97 4.57 20.92 27.61 2.02 4.55 21.20

"Bromine analysis. Calcd. for C,H,,BrNO- S;: Br, 2832. Found: Br. 28.50 Chlorine analysis. Calcd. for C H CINO ,S Cl. ll.5l. Found: Cl, ll.5l. ll.57 This material contained approximately 87: of the Z-chloro (ortho chloro) isomer. "Chlorine analysis. Calcd. for C H Cl.,NO S Cl, 19.57. Found: C], V4.40 Chlorine analysis. Calcd. for C-,H,CI NO S Cl, 26.05. Found: Cl. 26.00 Chlorine analysis. Calcd. for C-,H Cl;,NO S,: Cl. 34.69. Found: Cl. 34.50.

The compounds of the invention are employed as antimicrobials for the control of bacteria, fungi and yeasts. For such uses, the compounds can be employed in an unmodified form or dispersed on a finely divided solid and employed as dusts. Such mixtures can also be dispersed in water with or without the aid of a surfaceactive agent and the resulting aqueous suspensions employed as sprays. in other procedures, the products can be employed as active constituents in solvent solutions, oil-in-water or water-in-oil emulsions or aqueous disare obtained when employing compositions containing antimicrobial concentrations and usually from about 25 to 10,000 parts by weight of one or more of the compounds per million parts of such composition.

In representative operations, compounds of the present invention were tested for their activity as antimicrobials using conventional agar dilution tests. The following Table presents results, expressed as percent growth inhibition (numerator) over concentration of toxicant in parts per million (denominator).

TABLE II Example Cf Tm T 85 Ci Sa At Cp Pp Mp lOO 2 500 l00 I00 I00 I00 lOO l00 I00 100 100 3 j 500 500 500 500 500 500 500 500 100 l 00 l 00 l 00 I00 1 00 3k 500 500 500 500 100 Controls: no growth inhibition Cf Ceplmluast'us fruguns Tm Trirhuphlvn nmnlagruphyunr T Triclmdr'rma species 85 But'illns .ruhlilis Sa Slaphylucm-cus uurum At Aspt-rgillux Ierrcux Cp Candida pclliculuxu Pp Pulluluria pulluluns Mp Myruhurlerium p/1Ici persions. The augmented compositions are adapted to be formulated as concentrates and subsequently diluted with additional liquid or solid adjuvants to product the ultimate treating compositions. Good results What is claimed is: l. A l-(zirylthio)methanesulfonamide selected from the group consisting of N.N-dimethyl-l-(phenylthio)- wherein R represents H lowcrulkyl. lower alkoxy halo or trifluoromethyl. n represents an integer from zero io 3 and 2. The compound of claim 1 which is N.N-dimethyll-(phenylthio)methanesulfonamide.

3. The compound of claim 1 which is l-me!hyl-4- (((phcnylthio)methyl)sulionyhpiperazine.

4. The compound of claim 1 which is l-((pbromophenyl)thio)methanesulfonumide.

5. The compound of claim I which is l-((pmethoxyphenyl)thio)-N.N-dimethyl methanesulfonamide.

6. The compound of claim I which is 4- (((phcnyllhio)melhyl)sulllonyhmorpholinc.

7. The compound of claim I which is 4-((((pchlorophenyl)thio)methyl)sulfonyUmorpholine.

8. The compound of claim 1 which is l-((((p-i' butylphenylhhio)methyllsulfonyhpiperidine.

9. The compound of claim I which is 4-phcnyl-1' (((phenylthio)methyl)sulfonyl)piperidinei 10. The compound oll' claim 1 which is l-((3.4- dichlorophenyl)thio)methancsulfonamide.

H. The compound of claim I which is l-((3- (trifluoromethyhphenyl)ihio)methanesulfonumide.

12. The compound of' claim I which is l-((2.4.5-

trichlorophenyl )ihio )methanesulfonumide.

k 1F i i UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 5 ,895 O10 Dated July .1975

Inventor(5) Christian T. Goralski et al. Page 1 of 2 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 3, Table 1, under subheading R (item f) "4- (CH c" should read 4- c- Columns 3 & 4, Table II, in the footnotes of table, second item, "Tm Trichophton mentagrophytes should read Tm Trichophyton mentagrophytes;

ll ll Column 5, claim 1, lines 20 through 27 delete;

Column 6, claim 1, lines 1 and 2 delete.

Columns 3 and I-, Table II should read as shown on the attached sheet.

Signed and Sealed this sixth Day of April1976 [SEAL] Attest:

RUTHC. MSON C. MARSHALL DANN Alleslmg Officer (nmnu'sximwr oj'Patenrs and Trademarks 5, 95,010 Page 2 of 2 TABLE II Q xample Cf Tm T Bs Ci Sa At Cp Pp M0 100 100 100 100 100 100 100 100 100 3j 500 500 500 500 500 500 500 500 100 100 100 100 100 100 BR 500 500 500 500 100 Controls: no growth inhibition 

1. A 1-(ARYLTHIO)METHANESULFONAMIDE SELECTED FROM THE GROUP CONSISTING OF N,N-DIMETHYL-1-(PHENYLTHIO)METHANESULFONAMIDE, 1-METH-4-(((PHENYLTHIO)METHYL)SULFONYL)PIPERAZINE, 1-((P-BROMOPHENYL)THIO)METHANESULFONAMIDE, 1-((PMETHOXYPHENYL)THIO)-N,N-DIMETHYL METHANESULFONAMIDE, 4(((PHENYLTHIO)METHYL)SULFONYL)MORPHOLINE, 4-((((P-CHLOROPHENYL)THIO)METHYL)SULFONYL)MORPHOLINE, 1-((((P-T-BUTYLPHENYL)THIO)METHYL)SULFONYL)PIPERIDINE, 4-PHENYL-1(((PHENYLTHIO)METHYL)SULFONYL)PIPERIDINE, 1-((3,4-DICHLOROPHENYL)THIO)METHANESULFONAMIDE, 1-((3-TRIFLUOROMETHYL)PHENYL)THIO)METHANESULFONAMIDE, AND 1-((2,4,5-TRICHLOROPHENYL)THIO)METHANESULFONAMIDE,
 2. The compound of claim 1 which is N,N-dimethyl-1-(phenylthio)methanesulfonamide.
 3. The compound of claim 1 which is 1-methyl-4-(((phenylthio)methyl)sulfonyl)piperazine.
 4. The compound of claim 1 which is 1-((p-bromophenyl)thio)methanesulfonamide.
 5. The compound of claim 1 which is 1-((p-methoxyphenyl)thio)-N, N-dimethyl methanesulfonamide.
 6. The compound of claim 1 which is 4-(((phenylthio)methyl)sulfonyl)morpholine.
 7. The compound of claim 1 which is 4-((((p-chlorophenyl)thio)methyl)sulfonyl)morpholine.
 8. The compound of claim 1 which is 1-((((p-t-butylphenyl)thio)methyl)sulfonyl)piperidine.
 9. The compound of claim 1 which is 4-phenyl-1-(((phenylthio)methyl)sulfonyl)piperidine.
 10. The compound of claim 1 which is 1-((3,4-dichlorophenyl)thio)methanesulfonamide.
 11. The compound of claim 1 which is 1-((3-(trifluoromethyl)phenyl)thio)methanesulfonamide.
 12. The compound of claim 1 which is 1-((2,4,5-trichlorophenyl)thio)methanesulfonamide. 